摘要
石墨烯量子点作为一种零维新型纳米材料,除了拥有石墨烯的特性之外,因其独特的量子局限效应和边缘效应,在电学领域受到众多学者的广泛关注。根据椭球粒子的复合材料导电理论,建立了石墨烯量子点(GQDs)溶液有效电导率模型。结合实验结果并比较Hashin-Shtrikman(H-S)模型、渗流模型、有效介质理论(EMT)模型和普适性模型(GEM),确定了GEM模型为预测不同体积分数下GQDs溶液有效电导率的最优模型,并得到了相应的渗流阈值和临界指数。同时,考虑到多种外界因素的影响,研究了温度、频率和磁场强度对GQDs溶液有效电导率的影响,分析了实验结果的变化趋势,进一步完善了GQDs有效电导率的研究。
As a new zero-dimensional nanomaterial,graphene quantum dots(GQDs)have not only the properties of graphene,but also the unique quantum confinement effect and edge effect,which have been widely concerned by many scholars in the field of electricity.The effective conductivity model of GQDs solution was established based on the composite conductivity theory of ellipsoid particles.Combined with the experimental results and comparing H-S model,percolation model,effective medium theory(EMT)model and general effective media(GEM),the GEM model was determined as the optimal model to predict the effective conductivity of GQDs solution under different volume fraction,and the corresponding percolation threshold and critical index were obtained.Meanwhile,considering the influence of various external factors,the effects of temperature,frequency and magnetic field intensity on the effective conductivity of GQDs solution were studied,and the trend of experimental results was analyzed to further improve the study on the effective conductivity of GQDs.
作者
彭玉峰
朱梦南
韩雪云
Peng Yufeng;Zhu Mengnan;Han Xueyun(College of Electronic and Electrical Engineering,Henan Normal University,Xinxiang 453007;Key Laboratory of Optoelectronic Sensor Integration of Henan Province,Xinxiang 453007)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第S01期72-76,共5页
New Chemical Materials
基金
河南省重点研发与推广专项(182102310006)
关键词
石墨烯量子点溶液
有效电导率
普适性模型
graphene quantum dot solution
effective conductivity
general effective media
